Pump for pressure tanks



Nov. 1, 1932.

G BROWN PUMP FOR PRESSURE TANKS Filed July 19. 1930 lNVENTOR dlL IATTORNEY Patented Nov. 1, 1932 UNITED STATES rarsn'rorrics GREGORYBROWN, OF FAIRIEIELD, CONNECTICUT, ASSIGNOR TC BRIDGEPORT BRASS COMPANY,OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT PUMP FORrnnssunn TANKS Application filed July 19, 1930. Serial No. 469,063.

This invention relates to improvements in pumps designed particularlyfor creating pressure in a fuel tank or the like. Of course, the pumphas other uses. Pumps of this character have been in use to build uppressure in a closed tank so as to provide for the feed of the fueltherefrom. These pumps have been inefficient in that the air or fluidpressure would leak out or drop, and also in that they requireconsiderable work and eflort to build up the pressure within the tank.

The principal purpose of this invention is the provision of such a pumphaving a check valve construction provided with a wide or large seat anda check valve of greater width. This valve is preferably formed of brassor other similar material, and is securely held on its seat by thepressure within the tank and, of course, it is forced from its seat whenthe pump is operated to build up pressure within the tank.

T the accomplishment of the foregoing and such other objects as mayhereinafter appear, this invention consists in the construction,combination and arrangement of parts hereinafter described and thensought to be defined in the appended claims, reference being had to theaccompanying drawing forming a part hereof and which shows, merely forthe purpose of illustrative disclosure, a preferred embodiment of myinvention, it being expressly understood, however, that various changesmay be made in practice within the scope of the claims withoutdigressing from my inventive idea.

In the drawing Figure 1 represents a perspective view showing the pumpapplied to a tank wall, only a portion of the wall being shown.

Figure 2 represents a longitudinal cross sectional view of the pump.

Figure 3 represents a transverse sectional View taken on line 33 ofFigure 2.

Referring now to the drawing the numeral 1 designates the pump cylinderwhich is provided with a screw threaded flange or shoulder 2 whereby itmay be attached to a suitable tank or container 2. One end of thiscylinder is provided with the cap 3 through which is slidably mountedthe pump handle or rod at on the lower end of which is provided theplunger or piston 5. All of these parts are of more or less standardconstruction.

The lower or open end of the cylinder is provided with the inturned,curved, annular flange 6, the inner portion of this flange extendinginwardly and upwardly at an angle.

' inturned annular flange 6. As this flange is turned and curvedinwardly it forms a seat 14: for the lower end of the spring.

The operation of this pump is obvious. Reciprocation of the plunger orpiston forces air through the valve 6 and causes it to move from itsseat. Pressure against the wide outer face 15 of that valve plus theaction of spring 13 forces the valve 7 tightly on its seat therebypreventing the escape of air. so By making the valve seat larger theperiphery of the seat is increased in direct proportion to the increasein the diameter and the areas of the openings vary as the square of thediameter. Due to this fact a very strong spring can be used, and a muchgreater intensity of pressure per unit of valve seat length obtained. Atthe same time a pump i produced which Works very easily and readily.

What I claim is 1. A pump including in combination a cylinder, a plungeror piston reciprocable therein, the discharge end of a cylinder beingprovided with an inturned annular flange narrow in width with respect tothe diameter of the cylinder so as to afford a Valve seat and dischargeopening of substantial width, a check valve of substantial width adaptedto engage said seat and resilient means for normally holding said checkvalve on its seat.

2. A pump including in combination a cglinder, a plunger or pistonreciprocable t erein, the disc arge end of the cylinder being providedwith an inturned annular flange narrow in width with respect to thediameter of the cylinder so as to afford a valve seat and disc argeopening of substantial width, a check valve of substantial width adaptedto engage said seat and resilient means for normal holding said checkvalve on its seat, said c eck valve comprising an enlarged rubber plughaving a flat outer face and a bevelled or rounded side surface to fitsaid valve seat.

3. A pump including in combination a cylinder, a plunger or pistonreciprocable therein, the discharge end of the cylinder being providedwith an inturned annular flange narrow in width with respect to thediameter of the cylinder so as to afford a valve seat and dischargeopening of substantial width, a check valve construction including anassembly member having a check valve positioned on one end thereof and adisc or abutment member on the other end thereof, a spring interposedbetween said disc or abutment memher and the inner face of said annularflange so as to normally hold said check valve on its seat.

4. A pump including, in combination, a cylinder, a plunger or pistonreciprocably mounted therein, the end of the cylinder having an enlargeddischarge opening and valve seat provided by a curved inwardly extendingannular flange portion, a check valve construction comprising anassembly member, an enlarged valve mounted thereon and proi go videdwith a. flat outer surface and a rounded portion to fit said curvedannular flange, a disc or abutment member provided on said assemblymember and a spring interposed between said disc or abutment member andthe inner face of the inturned annular flange.

5. A device of the character described, in-

cluding,in combination, a pump cylinder, the

discharge end of the cylinder being provided with an inturned annularflange to form a valve seat and a discharge opening of substantialwidth, a check valve mechanism adapted to engage said seat and includingresilient means abutting the inner face of said annular flange fornormally holding said check valve mechanism on its seat.

6. A device of the character described, including, in combination. apump cylinder, the end of the cylinder having an enlarged dischargeopening and valve seat provided by a curved and inwardly extendingannular flange portion, a check valve construction comprising anassembly member, an enlarged valve mounted thereon and having a roundedportion to fit said curved annular flange .4 portion, a disk or abutmentmember in said cylinder and removably mounted on said assembly member,and spring means interposed between said disk or abutment member and theinner face of the inturned annular flange.

7. A device of the character described, including, in combination, apump cylinder, the end of the cylinder having an enlarged dischargeopening and valve seat provided by a curved and inwardly extendingannular flange portion, a check valve construction comprising anassembly member, an enlarged valve mounted thereon and having a roundedportion to fit said curved annular flange portion, a disk or abutmentmember in said cylinder and removably mounted on said assembly member,and spring means interposed between said disk or abutment member and theinner face of the inturned annular flange, the disk or abutment memberbeing larger in diameter than said discharge opening in said cylinder.

In testimony that I claim the foregoing, I have hereunto set my handthis 14th day of

